Crystal Field Theory
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CHXII09:COORDINATION COMPOUNDS

321842 Considering \(\mathrm{H}_{2} \mathrm{O}\) as a weak field ligand, the number of unpaired electrons in \(\left[\mathrm{Mn}\left(\mathrm{H}_{2} \mathrm{O}\right)_{6}\right]^{2+}\) will be (At.no. of \(\mathrm{Mn}=25\) )

1 three
2 five
3 two
4 four
CHXII09:COORDINATION COMPOUNDS

321843 Crystal field stabilization energy for high spin \({{\text{d}}^{\text{4}}}\) octahedral complex is:

1 \(-1.8 \Delta_{0}\)
2 \({\text{ - 1}}{\text{.6}}{\Delta _{\text{0}}}{\text{ + P}}\)
3 \(-1.2 \Delta_{0}\)
4 \(-0.6 \Delta_{0}\)
CHXII09:COORDINATION COMPOUNDS

321844 Which of the following statements is correct?

1 If \({{\rm{\Delta }}_{\rm{^\circ }}}{\rm{ < P}}\), low spin state is more stable.
2 \(\mathrm{CO}\) is a very weak ligand.
3 The colour of a complex depends only on the nature of metal ion.
4 Tetrahedral complexes have nearly \(50 \%\) CFSE value than octahedral complexes.
CHXII09:COORDINATION COMPOUNDS

321845 On the basis of crystal field theory, Co(III) forms paramagnetic octahedral complex with weak field ligands whereas it forms diamagnetic octahedral complex with strong field ligands because.
\({\text{I) }}{\Delta _{\text{o}}} < {\text{P, E}}{\text{.C is t}}_{{\text{2g}}}^{\text{4}}{\text{e}}_{\text{g}}^{\text{2}}{\text{, Paramagnetic}}\)
\({\text{II) }}{\Delta _{\text{o}}} > {\text{P, E}}{\text{.C }}{\mkern 1mu} {\mkern 1mu} {\text{is }}{\mkern 1mu} {\text{t}}_{{\text{2g}}}^{\text{6}}{\text{e}}_{\text{g}}^{\text{0}}{\text{,}}{\mkern 1mu} {\mkern 1mu} {\text{Diamagnetic,}}\)
\({\text{III)}}{\mkern 1mu} {\text{ }}{\Delta _{\text{o}}} < {\text{P, E}}{\text{.C }}{\mkern 1mu} {\mkern 1mu} {\text{is t}}_{{\text{2g}}}^{\text{4}}{\text{e}}_{\text{g}}^{\text{2}}{\text{,}}{\mkern 1mu} {\mkern 1mu} {\text{Diamagnetic}}{\text{.}}\)
\({\text{IV) }}{\Delta _{\text{o}}} > {\text{P,E}}{\text{. C }}{\mkern 1mu} {\mkern 1mu} {\text{is }}{\mkern 1mu} {\mkern 1mu} {\text{t}}_{{\text{2g}}}^{\text{6}}{\text{e}}_{\text{g}}^{\text{0}}{\text{,}}{\mkern 1mu} {\mkern 1mu} {\text{Paramagnetic}}\)
choose the correct option.

1 Only I
2 Only II
3 Only III & IV
4 Only I & II
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CHXII09:COORDINATION COMPOUNDS

321842 Considering \(\mathrm{H}_{2} \mathrm{O}\) as a weak field ligand, the number of unpaired electrons in \(\left[\mathrm{Mn}\left(\mathrm{H}_{2} \mathrm{O}\right)_{6}\right]^{2+}\) will be (At.no. of \(\mathrm{Mn}=25\) )

1 three
2 five
3 two
4 four
CHXII09:COORDINATION COMPOUNDS

321843 Crystal field stabilization energy for high spin \({{\text{d}}^{\text{4}}}\) octahedral complex is:

1 \(-1.8 \Delta_{0}\)
2 \({\text{ - 1}}{\text{.6}}{\Delta _{\text{0}}}{\text{ + P}}\)
3 \(-1.2 \Delta_{0}\)
4 \(-0.6 \Delta_{0}\)
CHXII09:COORDINATION COMPOUNDS

321844 Which of the following statements is correct?

1 If \({{\rm{\Delta }}_{\rm{^\circ }}}{\rm{ < P}}\), low spin state is more stable.
2 \(\mathrm{CO}\) is a very weak ligand.
3 The colour of a complex depends only on the nature of metal ion.
4 Tetrahedral complexes have nearly \(50 \%\) CFSE value than octahedral complexes.
CHXII09:COORDINATION COMPOUNDS

321845 On the basis of crystal field theory, Co(III) forms paramagnetic octahedral complex with weak field ligands whereas it forms diamagnetic octahedral complex with strong field ligands because.
\({\text{I) }}{\Delta _{\text{o}}} < {\text{P, E}}{\text{.C is t}}_{{\text{2g}}}^{\text{4}}{\text{e}}_{\text{g}}^{\text{2}}{\text{, Paramagnetic}}\)
\({\text{II) }}{\Delta _{\text{o}}} > {\text{P, E}}{\text{.C }}{\mkern 1mu} {\mkern 1mu} {\text{is }}{\mkern 1mu} {\text{t}}_{{\text{2g}}}^{\text{6}}{\text{e}}_{\text{g}}^{\text{0}}{\text{,}}{\mkern 1mu} {\mkern 1mu} {\text{Diamagnetic,}}\)
\({\text{III)}}{\mkern 1mu} {\text{ }}{\Delta _{\text{o}}} < {\text{P, E}}{\text{.C }}{\mkern 1mu} {\mkern 1mu} {\text{is t}}_{{\text{2g}}}^{\text{4}}{\text{e}}_{\text{g}}^{\text{2}}{\text{,}}{\mkern 1mu} {\mkern 1mu} {\text{Diamagnetic}}{\text{.}}\)
\({\text{IV) }}{\Delta _{\text{o}}} > {\text{P,E}}{\text{. C }}{\mkern 1mu} {\mkern 1mu} {\text{is }}{\mkern 1mu} {\mkern 1mu} {\text{t}}_{{\text{2g}}}^{\text{6}}{\text{e}}_{\text{g}}^{\text{0}}{\text{,}}{\mkern 1mu} {\mkern 1mu} {\text{Paramagnetic}}\)
choose the correct option.

1 Only I
2 Only II
3 Only III & IV
4 Only I & II
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CHXII09:COORDINATION COMPOUNDS

321842 Considering \(\mathrm{H}_{2} \mathrm{O}\) as a weak field ligand, the number of unpaired electrons in \(\left[\mathrm{Mn}\left(\mathrm{H}_{2} \mathrm{O}\right)_{6}\right]^{2+}\) will be (At.no. of \(\mathrm{Mn}=25\) )

1 three
2 five
3 two
4 four
CHXII09:COORDINATION COMPOUNDS

321843 Crystal field stabilization energy for high spin \({{\text{d}}^{\text{4}}}\) octahedral complex is:

1 \(-1.8 \Delta_{0}\)
2 \({\text{ - 1}}{\text{.6}}{\Delta _{\text{0}}}{\text{ + P}}\)
3 \(-1.2 \Delta_{0}\)
4 \(-0.6 \Delta_{0}\)
CHXII09:COORDINATION COMPOUNDS

321844 Which of the following statements is correct?

1 If \({{\rm{\Delta }}_{\rm{^\circ }}}{\rm{ < P}}\), low spin state is more stable.
2 \(\mathrm{CO}\) is a very weak ligand.
3 The colour of a complex depends only on the nature of metal ion.
4 Tetrahedral complexes have nearly \(50 \%\) CFSE value than octahedral complexes.
CHXII09:COORDINATION COMPOUNDS

321845 On the basis of crystal field theory, Co(III) forms paramagnetic octahedral complex with weak field ligands whereas it forms diamagnetic octahedral complex with strong field ligands because.
\({\text{I) }}{\Delta _{\text{o}}} < {\text{P, E}}{\text{.C is t}}_{{\text{2g}}}^{\text{4}}{\text{e}}_{\text{g}}^{\text{2}}{\text{, Paramagnetic}}\)
\({\text{II) }}{\Delta _{\text{o}}} > {\text{P, E}}{\text{.C }}{\mkern 1mu} {\mkern 1mu} {\text{is }}{\mkern 1mu} {\text{t}}_{{\text{2g}}}^{\text{6}}{\text{e}}_{\text{g}}^{\text{0}}{\text{,}}{\mkern 1mu} {\mkern 1mu} {\text{Diamagnetic,}}\)
\({\text{III)}}{\mkern 1mu} {\text{ }}{\Delta _{\text{o}}} < {\text{P, E}}{\text{.C }}{\mkern 1mu} {\mkern 1mu} {\text{is t}}_{{\text{2g}}}^{\text{4}}{\text{e}}_{\text{g}}^{\text{2}}{\text{,}}{\mkern 1mu} {\mkern 1mu} {\text{Diamagnetic}}{\text{.}}\)
\({\text{IV) }}{\Delta _{\text{o}}} > {\text{P,E}}{\text{. C }}{\mkern 1mu} {\mkern 1mu} {\text{is }}{\mkern 1mu} {\mkern 1mu} {\text{t}}_{{\text{2g}}}^{\text{6}}{\text{e}}_{\text{g}}^{\text{0}}{\text{,}}{\mkern 1mu} {\mkern 1mu} {\text{Paramagnetic}}\)
choose the correct option.

1 Only I
2 Only II
3 Only III & IV
4 Only I & II
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CHXII09:COORDINATION COMPOUNDS

321842 Considering \(\mathrm{H}_{2} \mathrm{O}\) as a weak field ligand, the number of unpaired electrons in \(\left[\mathrm{Mn}\left(\mathrm{H}_{2} \mathrm{O}\right)_{6}\right]^{2+}\) will be (At.no. of \(\mathrm{Mn}=25\) )

1 three
2 five
3 two
4 four
CHXII09:COORDINATION COMPOUNDS

321843 Crystal field stabilization energy for high spin \({{\text{d}}^{\text{4}}}\) octahedral complex is:

1 \(-1.8 \Delta_{0}\)
2 \({\text{ - 1}}{\text{.6}}{\Delta _{\text{0}}}{\text{ + P}}\)
3 \(-1.2 \Delta_{0}\)
4 \(-0.6 \Delta_{0}\)
CHXII09:COORDINATION COMPOUNDS

321844 Which of the following statements is correct?

1 If \({{\rm{\Delta }}_{\rm{^\circ }}}{\rm{ < P}}\), low spin state is more stable.
2 \(\mathrm{CO}\) is a very weak ligand.
3 The colour of a complex depends only on the nature of metal ion.
4 Tetrahedral complexes have nearly \(50 \%\) CFSE value than octahedral complexes.
CHXII09:COORDINATION COMPOUNDS

321845 On the basis of crystal field theory, Co(III) forms paramagnetic octahedral complex with weak field ligands whereas it forms diamagnetic octahedral complex with strong field ligands because.
\({\text{I) }}{\Delta _{\text{o}}} < {\text{P, E}}{\text{.C is t}}_{{\text{2g}}}^{\text{4}}{\text{e}}_{\text{g}}^{\text{2}}{\text{, Paramagnetic}}\)
\({\text{II) }}{\Delta _{\text{o}}} > {\text{P, E}}{\text{.C }}{\mkern 1mu} {\mkern 1mu} {\text{is }}{\mkern 1mu} {\text{t}}_{{\text{2g}}}^{\text{6}}{\text{e}}_{\text{g}}^{\text{0}}{\text{,}}{\mkern 1mu} {\mkern 1mu} {\text{Diamagnetic,}}\)
\({\text{III)}}{\mkern 1mu} {\text{ }}{\Delta _{\text{o}}} < {\text{P, E}}{\text{.C }}{\mkern 1mu} {\mkern 1mu} {\text{is t}}_{{\text{2g}}}^{\text{4}}{\text{e}}_{\text{g}}^{\text{2}}{\text{,}}{\mkern 1mu} {\mkern 1mu} {\text{Diamagnetic}}{\text{.}}\)
\({\text{IV) }}{\Delta _{\text{o}}} > {\text{P,E}}{\text{. C }}{\mkern 1mu} {\mkern 1mu} {\text{is }}{\mkern 1mu} {\mkern 1mu} {\text{t}}_{{\text{2g}}}^{\text{6}}{\text{e}}_{\text{g}}^{\text{0}}{\text{,}}{\mkern 1mu} {\mkern 1mu} {\text{Paramagnetic}}\)
choose the correct option.

1 Only I
2 Only II
3 Only III & IV
4 Only I & II
For More Updates join with Us
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